WarmWool Jib Beanie from Aclima has a WoolNet Original inside, which gives very good insulating and wicking properties. 100% Merino Wool outside. Fits perfectly underneath a helmet. Unisex.\n\nFabric: 100% Merino Wool.Size S is suitable for children and youngsters. Size M is suitable for men and women with a smaller head circumference. While L is suitable for men and women with normal to large head circumference.  Aclima WarmWool Jib Beanie Poinciana | Buy Aclima WarmWool Jib Beanie Poinciana here | Outnorth